Arnold, who will be represented by defense attorney Joseph Murtha, is scheduled to go to trial on Nov. 18.

According to State's Attorney spokesman Wayne Kirwan, Bulmer's trial was postponed so the defense could "continue the investigation of a possible not criminally responsible defense and obtain educational assessments necessary for the not criminally responsible evaluation."

The prosecution did not object to the motion, according to online court records.

Bulmer told police on May 10 at the crime scene that he had killed Lane and that Arnold had told him to do it, according to charging documents.

The pair discussed the crime for approximately two months prior to Lane's death, according to the documents. The pair were planning to run away together to California, the documents state.